Indoor low voltage current transformer, 0.66kV rated, epoxy resin casting type, for current measurement and protection in low voltage distribution systems. Complies with IEC 61869 and GB/T 20840 standards. Wide range of current ratios available, multiple accuracy classes. Compact size, easy installation, suitable for switchgear and panel mounting. Customizable ratios and specifications.
Indoor LV CT for 0.66kV systems, suitable for measurement and protection in switchgear and panels.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | IEC 61869 / GB/T 20840 |
| Model Code | LN-0.66 | Factory nameplate marking |
| Primary Voltage | 0.66kV | Rated voltage test (IEC 61869-1/3) |
| Secondary Voltage | 5A/1A | Ratio check at rated frequency |
| Accuracy Class | 0.2/0.5/1.0 | Accuracy test (IEC 61869-2 / IEEE C57.13) |
| Rated Burden | [On Request] | Burden test at rated VA |
| Insulation Type | Dry Epoxy Resin | Dielectric tests per standard |
| Insulation Level (BIL) | [On Request] | Power-frequency & lightning impulse withstand |
| Standards | IEC 61869 / GB/T 20840 | Certified to listed standards |
| Frequency | 50/60Hz | Per IEC 61869-1 |
| Environment | [On Request] | Per datasheet limits |
Ideal For
Not Recommended For
Connect primary through the window. Secondary terminals: 1S1 and 1S2 for measurement; if protection winding exists, use 2S1-2S2. Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. Follow IEC 61869 / GB/T 20840 for terminal markings.
Compliant with: IEC 61869 / GB/T 20840
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What is the rated primary voltage of this CT?
A: The rated primary voltage is 0.66kV.
Q: What accuracy classes are available?
A: Accuracy classes available are 0.2, 0.5, and 1.0.
Q: Can this CT be used outdoors?
A: No, it is designed for indoor use only.
Missing fields are marked [On Request] — never fabricated. M2/M5/M6 verification rows follow IEC 61869 / IEEE C57.13 conventions.
| Model | Rated current ratio (A) | Rated output (VA) | Accuracy class | Primary current / turns | Turns through core | Overall dimensions | Aperture dimensions (W×H) | Mounting dimensions (W×H) | ||
|---|---|---|---|---|---|---|---|---|---|---|
| W | D | H | ||||||||
| LMK1-0.66/30 (BH-0.66/30) | 30/5 | 1 | 0.5 | 1 | 1 | 78 | 32 | 78 | 30×30 | 82×31 |
| 40/5 | 1 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 50/5 | 1 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 60/5 | 2 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 75/5 | 2 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 100/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 150/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 200/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 250/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 300/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 400/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 600/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMK1-0.66/40 (BH-0.66/40) | 100/5 | 2.5 | 0.5 | 1 | 1 | 85 | 42 | 78 | 30×30 | 82×31 |
| 150/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 200/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 250/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 300/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 400/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 600/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMK1-0.66/60 (BH-0.66/60) | 300/5 | 5 | 0.5 | 1 | 1 | 90 | 52 | 80 | 30×30 | 82×31 |
| 400/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 600/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1200/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMK1-0.66/80 (BH-0.66/80) | 400/5 | 5 | 0.5 | 1 | 1 | 105 | 70 | 100 | 40×40 | 82×31 |
| 500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 600/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1200/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMK1-0.66/100 (BH-0.66/100) | 600/5 | 5 | 0.5 | 1 | 1 | 120 | 80 | 110 | 50×50 | 82×31 |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1200/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 3000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMK2-0.66/30 (SDH-0.66/30) | 150/5 | 2.5 | 0.5 | 1 | 1 | 87 | 40 | 100 | 30×30 | 82×30 |
| 200/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 250/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 300/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 400/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 600/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMK2-0.66/40 (SDH-0.66/40) | 200/5 | 2.5 | 0.5 | 1 | 1 | 90 | 45 | 110 | 30×30 | 82×30 |
| 250/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 300/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 400/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 600/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1200/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMK2-0.66/60 (SDH-0.66/60) | 400/5 | 5 | 0.5 | 1 | 1 | 102 | 60 | 140 | 40×40 | 82×30 |
| 500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 600/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1200/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMK2-0.66/80 (SDH-0.66/80) | 600/5 | 5 | 0.5 | 1 | 1 | 108 | 80 | 150 | 50×50 | 82×30 |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1200/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 3000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMK3-0.66/30 (LN-0.66/30) | 150/5 | 2.5 | 0.5 | 1 | 1 | 118 | 40 | 120 | 30×30 | 82×30 |
| 200/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 250/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 300/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 400/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 600/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMK3-0.66/40 (LN-0.66/40) | 200/5 | 2.5 | 0.5 | 1 | 1 | 140 | 60 | 120 | 40×40 | 82×30 |
| 250/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 300/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 400/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 600/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1200/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMK3-0.66/60 (LN-0.66/60) | 400/5 | 5 | 0.5 | 1 | 1 | 140 | 60 | 120 | 40×40 | 82×30 |
| 500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 600/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1200/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMK3-0.66/80 (LN-0.66/80) | 600/5 | 5 | 0.5 | 1 | 1 | 187 | 80 | 120 | 50×50 | 82×30 |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1200/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 3000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMK3-0.66/100 (LN-0.66/100) | 1000/5 | 5 | 0.5 | 1 | 1 | 227 | 80 | 120 | 50×50 | 82×30 |
| 1200/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 3000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMZ1-0.66/30 (BH-0.66/30) | 100/5 | 2.5 | 0.5 | 1 | 1 | 248 | 88 | 110 | 30×30 | 228×80 |
| 150/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 200/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 250/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 300/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 400/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 600/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMZ1-0.66/40 (BH-0.66/40) | 200/5 | 2.5 | 0.5 | 1 | 1 | 270 | 90 | 110 | 30×30 | 228×80 |
| 250/5 | 2.5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 300/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 400/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 600/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| LMZ1-0.66/60 (BH-0.66/60) | 300/5 | 5 | 0.5 | 1 | 1 | 300 | 100 | 110 | 30×30 | 228×80 |
| 400/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 600/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 750/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 800/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1200/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 1500/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
| 2000/5 | 5 | 0.5 | 1 | 1 | — | — | — | — | — | |
Dimension & outline drawing of LN-0.66 — click image to zoom / view original.
